UV index is 6 today — high. Apply sunscreen before heading out, and consider a hat or shade during peak hours (roughly late morning to mid-afternoon).

Air quality is considered satisfactory, and air pollution poses little or no risk. It’s a good day to be active outside.

Morning before 10 AM or evening after 4 PM is the more comfortable window for outdoor activity today.

Nearby Regional Outlook

Chicago Weather Radar

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Frequently Asked Questions

What is the hottest month in Chicago?

The hottest month in Chicago is typically July, with daytime highs averaging around 27.3°C (81°F), based on 10 years of historical weather data. Overnight lows during this period average near 19.5°C (67°F).

What is the coldest month in Chicago?

The coldest month in Chicago is typically January, with overnight lows averaging around -6.7°C (20°F) and daytime highs near 0.2°C (32°F), based on 10 years of historical weather data. Freezing overnight temperatures are common during this month, so plan for icy conditions in the early morning.

Does Chicago have a rainy season?

Chicago doesn't have a sharply defined rainy season rainfall is fairly spread across the year based on 10 years of historical data. July is the wettest month on average (about 152 mm), while February is the driest (about 59 mm).

What's the best time of year to visit Chicago?

The best time to visit Chicago is typically September, when daytime highs average a comfortable 23.9°C (75°F). Rainfall during this window averages around 92 mm, one of the lighter, more comfortable stretches of the year. This is based on 10 years of historical weather data.

Is Chicago's air quality safe right now?

As of the latest reading, Chicago's air quality index (AQI) is 48, rated "Good", based on the nearest monitoring station. Air quality is considered satisfactory, with little to no health risk.

Atmospheric Details

Wind

8 km/h

ESE · Light Breeze · Max 15 km/h

Humidity

73 %

High · feels muggy

UV Index

High

Visibility

16 km

Excellent

Pressure

995 hPa

Low · change likely

Dew Point

14°C

Somewhat humid

Today vs Normal

25°C+3° above normal

The long-term average high for today is 22°C.

21 of the last 28 days with published data ran above normal.

It continues that pattern - today's forecast is also running above normal.

Red = above normal, blue = at or below · last 12 days

Air Quality

Good

Air quality is considered satisfactory, and air pollution poses little or no risk. It’s a good day to be active outside.

Health & Activity Advice

⚠ Take Precautions

UV index is 6 today — high. Apply sunscreen before heading out, and consider a hat or shade during peak hours (roughly late morning to mid-afternoon).

Air quality is considered satisfactory, and air pollution poses little or no risk. It’s a good day to be active outside.

Morning before 10 AM or evening after 4 PM is the more comfortable window for outdoor activity today.